IO-540 A,B,E,G,K,M,S,P, IO-550, TIO-550,
TIO-520, TIO-540 (except C), IO-720
300 watts or less / Thermostatically Controlled
110/120 volts (models 441 and 540 are available in 220 volts).
3 to 5 hours on cold soaked engine. Since the unit is thermostatically controlled, it may be left on overnight, or on all the time. Cowl covers and prop covers are recommended for extreme cold weather. They also reduce preheat time.
2 pads 1) 3 1/4 x 4 1/2, 2) 3 x 4 with a 21" cord connecting the pads with one lighted plug.
*Where Space Allows